US80027A - James swan - Google Patents

Description

J. SWAN.

Making Auger Bits.

Patented July 14, 1868.

J AMES SWJTN, OF SEYMOUR, CONNECTICUT.

Letters Patent No. 80,027, dated July 14, 1868.

IMPROVEMENT IN THE MANUFACTURE OF NIGER-BITS.

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TO ALL WHOM ITMAY CONCERN:

'Be it known that I, JAMES SWAN, of Seymour, in the county of New Havenpand State of Connecticut, have invented a new and useful Improvement'in the Manufacture of Spur-Auger Bitsi and I do hereby declare that the following is a full, clear, and exact description thereof, which will enable those skilled in the art to. make and use the same, reference being had to the accompanying drawings, forming part of this specification.

' This invention relates to a new and useful improvement in the manufacture of spur-auger hits, and is designed to accomplish, by means of dies, what has hitherto been done by hand with skilled labor.

In the accompanying sheet of drawings'- 7 Figure 1 is a view of a bit-blank, constructed or formed in the usual way, and in a proper condition to be operated upon according to my invention.

Figure 2, a view of one of a pair of dies, by 'which the first process of my invention is carried out or accomplished. v

Figure 3, a view of a bit after being operated by said dies.

Figure 4, a view of one of a pair of dies by which the bit is completed.

Figure 5, a view of a bit completed according to my invention.

Similar letters of reference indicate corresponding parts.

A represents a bit-blank, which is crimped or twisted and upset at the end, in order to' have a sufliciency of metal at that part for the proper formation of'the lips, spurs, and screw.

This is accomplished by the ordinary process of manufacture, and'hitherto thc point a, lips I) b, and spurs c a, have been formed by hand and by skilled workmen, who, with peculiarly-shaped tools and many blows of a hand-hammer of peculiar construction, form in a crude manner the parts above specified. v

I accomplish this result .by means of two die s, one of which, 13, is shown in fig. 2, an ordinary drop-prcss being used.

This die is formed with recessesor cavities e e, which preserve the material of which the spurs are formed. Cavities bil are also formed, which leave the blank, when pressed with the iipb and cutting-edge, between said lip and the screw-pointer, as shown in fig. 3.

These dies, in forming the parts above named, leave a flash, cl, all around them, (see fig. 3,) and this is removed by dies, one of which, C, the female one, is shown in fig. 4.

After the removal of the flashf'the finishing is done in the usual or any proper way.

The bit, with the flash removed, is shown in fig. 5.

Theadvantage of this improvement consists in the accurate and uniform work produced, which cannot be eg ualled by the ordinary hand process.

I do not claim forming the screw-lips and spurs o'f auger-hits by means of dies and a drop-press, but what I claim asnew, and desire to secure by Letters Patent, is-

1. As my improvement of the dies B and C, the cavities e e, for preserving the material for the spurs c c, as described.

2. As my improvement in auger-blanks, the projecting portions 1) c d, of metal, of which to form the lip and spur, of the form, and arranged relative to the screw-point and cutting-bit, as described.

' JAMES SWAN.

Witnesses:

CHAS. DOUGLASS, EDMUND H. Kmeurr.

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